> ## Documentation Index
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> Use this file to discover all available pages before exploring further.

# Polish KSeF FA_VAT v2.x

Key: <code>pl-favat-v2</code>

## Correction Definitions

Auto-generation of corrective invoices or credit and debit notes is
supported.

A reason is required in the <code>reason</code> field
when submitting the correction options.

### Invoice Types

The types of invoices that can be created with a preceding definition:

* <code>credit-note</code>

### Stamp Keys

Stamp keys from the previous invoice that need to be referenced:

* <code>favat-id</code>

### Extension Keys

One or all of the following extensions may be required as part of the correction
options. See the [Extensions](#extensions) section for possible values.

* <code>pl-favat-effective-date</code>

## Extensions

### Special VAT Extensions for KSeF

<Accordion title="pl-favat-vat-special">
  | Code              | Name      |
  | ----------------- | --------- |
  | <code>taxi</code> | Taxi Rate |
</Accordion>

### Zero VAT Extensions for KSeF

<Accordion title="pl-favat-vat-zero">
  | Code                  | Name     |
  | --------------------- | -------- |
  | <code>wdt</code>      | WDT      |
  | <code>domestic</code> | Domestic |
  | <code>export</code>   | Export   |
</Accordion>

### Effective date code.

<Accordion title="pl-favat-effective-date">
  | Code           | Name       |
  | -------------- | ---------- |
  | <code>1</code> | Original   |
  | <code>2</code> | Correction |
  | <code>3</code> | Other      |
</Accordion>